Section A
Directions: In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A , B, C, and D.
Most of the students failed in the final exam. It __ easy.
A．can't be
B．shouldn't be
C．mustn't have been
D．couldn't have been

听力原文：Picture this: A foraging squirrel comes into range of a hungry, coiled rattlesnake. The squirrel realizes the danger too late -- the rattlesnake strikes out and bites, fangs pumping venom deep into the squirrel's small body. The poison doesn't kill immediately, but the squirrel's death war- rant is signed all the same. Even as he squirms away from the snake and bounds to his hiding place in the underbrush, the venom works its way through his system, dissolving his tissues and eventually killing him. Meanwhile the snake slithers after the departed squirrel, taking his time. Uncannily, he homes right in on the squirrel's hiding place. How did the snake know where his prey was hiding？ Do snakes have some kind of magical sixth sense？ Actually, snakes DO have a kind sixth sense, but it has nothing to do with magic.
Although snakes often have very sharp vision, a sense of smell, and a sensitivity to heat and vibrations, their most important sensory system is one that we humans don't share with them at all. This sixth sense is called the "vomeronasal system", and the sense organs for this are two tiny, bulb-shaped structures located on the roof of the snake's mouth. This sensory system is somewhat similar to smell -- in that it senses the presence of chemicals in the snake's environment. Snakes can use this extra sense to detect the faint chemical traces left by departing prey, or they can use it to track down a mate. On our next program we'll learn how snakes use their flicking, forked tongue to aid this sixth sense in the quest for prey.
What is this passage about？
A．The sharp vision of a snake.
B．The sharp sense of smell of a snake.
C．The unique poision of a snake.
D．The "six sense" of a snake to locate preys.

Where is the sense organs for vemeronasal system in snakes？
A．At the bottom of the snakes' mouth.
B．On the roof of the snakes' mouth.
C．On the left side of the snakes' mouth.
D．On the right side of the snakes' mouth.

She tried to __ him to give up the impractical plan.
A．persuade
B．tempt
C．attract
D．suggest

What sensory system don't we humans share with snakes at all？
A．The vomeronasal system.
B．The metabolism system.
C．The digestive system.
D．The respiratory system.

听力原文：M: Excuse me, but when can I take the bus for the airport？
W: There is a bus at 10 o'clock. You'll have to wait for five minutes.
Q: What time is it now？
（9)
A．9:55.
B．10:00.
C．9:50.
D．10:05.